Abstract
In this paper an alternative procedure to vibro-acoustics study of beam-type structures is presented.
With this procedure, it is possible to determine the resonant modes, the bending wave propagation velocity
through the study of the radiated acoustic field and their temporal evolution in the frequency range selected.
As regards the purely experimental aspect, it is worth noting that the exciter device is an actuator
similar to is the one employed in distributed modes loudspeakers; the test signal used is a pseudo random
sequence, in particular, an MLS (Maximum Length Sequence), facilitates post processing. The study case
was applied to two beam-type structures made of a sandstone material called Bateig. The experimental
results of the modal response and the bending propagation velocity are compared with well-established analytical
solution: Euler-Bernoulli and Timoshenko models, and numerical models: Finite Element Method
– FEM, showing a good agreement.
Go to article
Authors and Affiliations
Segovia Eulogio Enrique G.